Tire-tread.



N. J. BUSBY.

TIRE TREAD.

APPLICATION FILED APR.15. 1910.

Patented May 23, 1911.

2s resistance to wear without any material re- I ere'nce to Fig.

- resistance power to m sitar rnr - TIRE-BREAD.

w Specification of Letters Patent.

Patented Ma 23, 1211.

To all who-m it may eoncem:

Be, it known that I, NAHUM JUDsoN BUsBY, a citizen of the United States, re-g siding at Boston, in the county of Suflolk and State of Massachusetts, have invented new and useful Improvements in Tire- Treads, of which the following is a specification.

-My invention relates to tires, improved construction of 1 not only prolong the wear of the same, but will also materially reduce the cost thereof.

, In the drawing Figure 1 is a side eleva-' tion of a wheel having a solid tire thereon formed of my improved material. Fig. 2 is an enlarged detail sectional View on the line 2-2 Fig. 1. J

Specifically my invention embodies a tread for tires consisting of an admixture of quartz and elastic, material, preferably rubber. By forming this admixture with a somewhat greater percentage of quartz thanrubber a material reduction in the cost of a tire is obtained, as well as an increased duction in the resiliency.

In the drawing the referencenumeral 1 shows the rim of a wheel, and 2 the tread portion of a solid tire thereon composed of an admixture of quartz and 'rubber as shown. As seen, in Fig. 2, the seat or base 3 of the tire where it is connected to the rim 1 is formed of solid r bber or its equivalent, no quartz enterin into thecon'struction at this point, whic gives an increased th tire when resting on It will also be observed by ref- 2 that the tread portion 2 and the rim 1.

use, as my anti-slipping material quartz re- Application filed April 15, 1910. Serial No. 555,659.

so that there is no defined line of demarcahole betion between the two, the tire as a w ing formed in one which homogeneous mass is vulcanized at one operation. Said seat or base is also formed with integral flanges 4, whereby the tire may be more readily secured in position on the wheel.

While I have shown my invention composed of a solid tire, it will be understood that it is equally applicable to the tread surfaces of pneumatic t1res.

I do not confine myself to any particular shape at the base of the tire for fastening the same on the wheel rim, as the'same may be varied in any desired manner without depart-ing tion- While I have .described, and prefer to duced to fragments of the required s1ze,

from the spirit of my mvenwish it to be understood that I contemplate the use of any hard substance possessing quartz-like anti-slipping qualities.

Having thus descrlbed my invention, what I I claim is new and desire to secure by Letters Patent is An integral tire, body portion formed ofan admixture of a quartz like substance and rubber, and a base composed wholly of rubber,

said portions merged in a homogeneous comprising a main or body without a definite line of demarcation.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

k f .NAHUMJUDSON BUSBY.

. Witnesses:

i NAHUM J. BUSBY, Jr.,

Hrerm Srrmcnn BARTLETT Gorovnr. BusBr. i a l 

